Changes to ghc

Changes to ghc:
commit 0960a37868e6d08857e86465c8ca346b29b1c813
Author: Austin Seipp <austin@well-typed.com>
Date:   Mon Apr 28 04:13:07 2014 -0500

    rm -rf ./docs/comm

    The Commentary is now on the wiki and far more complete. This copy will
    of course live on in the annals of history, but there's no reason to
    keep it around still.

    Signed-off-by: Austin Seipp <austin@well-typed.com>